I know exactly how emitter follower (EF) arrangement of transistors works (when used as power current amplifying stage). But according to my book (G. Randy Slone: High Power Audio Amplifier Construction Manual) there is an improvement that can be added to EF. And that would be the Switch-off capacitor (look at the schematic given below - orange box).
I have given the circuit its values as it is shown in my book.
In the book, the author says (referring to class B amplifier): "...the output transistor must be turned off rapidly, when their conduction period ceases, or we wind up with very undesirable condition of both output transistors conducting simultaneously." And later on, he refers to such undesired condition as "switching distortion".
I have few questions to this topic:
Do the transistor Q1 and Q3 discharge more quickly if that switch-off capacitor and resistor are added to such circuit? Why should you call a crossover conduction (where both output transistors are conducting simultaneously) a distortion; a switching distortion? It is rather disadvantage for power dissipation of transistors (if operating in class AB amplifier). Also, it is desired for an amplifier to work in class AB amplifier, because it prevents the possibility of cross-over distortion